How does this work?

We had a hundred chicks to sell and people have coming to get them three and four at a time. Fine, I love to see the people come with their little kids and pick out the baby chicks but husband says "these chickens are eating us out of house and home, we gotta get rid of some a little quicker." Okay, so a guy calls and talks to husband about coming to get chicks. Next thing I know he's traded 20 of my baby chicks for 30 Cornish chicks. How does this work that you get rid of chicks and end up with more chicks than you started with? And who's going to process all these Cornish chickens?